Muffler



0. s. JEFFRIES, sR.

MUFFLER.

APPLICATION FILED SEPT-9, I919. I

1,353,478, PatentedSept. 21,1920.

2 SHEETS-SHEET I.

0. s. JEFFRIES, sn.

MUFFLER.

APPLICATION FILED SEPT. 9 I919- Patented Sept. 21,1920.

2 SHEETSSHEET 2.

NITED STATES PATENT OFFICE.

OSCAR S. JEFFRIES, S3,, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TO GEORGEW. KIRK, OF PHILADELPHIA, PENSYLVANIA.

MUFIE'LEB.

Specification of Letters Patent. Patented Sept. 21, 1920.

Application filed September 9, 1919. Serial No. 322,712.

To all whom it may concern:

Be it known that I, OSCAR S. Jnrrnrns,-Sr., a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Mufflers, of which the following -is a specification.

This invention relates to mufflers and has for its primary object the provision of a mufller which will eliminate the audible sound waves which are incident to the release of exhaust from the exhaust pipe of an internal combustion engine.

A further object of the invention is to provide in a mufller of the above mentioned character a means whereby the kinetic energy of the exhaust gases may be destroyed within the muliler prior to its being liberated into the surrounding atmosphere. V

A further object of the invention is to provide a muffler of the above mentioned character which is simple in construction, cheap to manufacture and effective in use.

Other objects and advantages of the invention will be apparent during the course of the following description taken in connection with the accompanying drawings.

In the drawings, forming a part of this specification and wherein like numerals are employed to designate like parts throughout the same,

Figure l is a vertical sectional view through the device embodying my invention,

Fig. 2 is an end elevation of the device,

Fig. 3 is a perspective view of a sectional unit,

Fig. 4 is a fragmental sectional view of a modified form of the device,

Fig. 5 is an edge elevation of the device embodying my invention, and,

Fig. 6 is a perspective sectional view of a portion of the device shown, Fig. 5.

In thedrawings, wherein for the purpose of illustration is shown a preferred form of my invention, the numeral 5 indicates side walls each of which is provided with tangential extensions 6 and openings 7, one of the openings being normally closed by a plate 8 andthe other communicating with a tail pipe 9. To the side walls 5 in proximity to the openings 7 there is suitably connected a plate indicated as a whole by the numeral 10 the plate comprising flanges 11 and a depending lip 12. To the plate 10 there is connected by means of rivets 13 passed through openings i l a second plate identical with the first named plate, the rivets 13 being passed through openings 15 carried at that end of theplate opposite the dependin tongue 12 as clearly shown in Fig. 3. he device is built up of a plurality of plates identical with that shown in Fig. 3, the plates being secured to the side walls 5 and to each other as hereinbefore described. In building up the device the plates are secured first to the center as shown and arranged in a circular row to provide a spiral passage 16, which passage communicates with an intake passage 17 which is formed by the provision of a tubular pipe 18 suitably connected to the side walls 5 and to certain plates as shown 19.

In Figs. 4 to 6 inclusive I have shown a modified form of the invention which comprises a pair of spiral walls 20 carrying an inner wall 21. The outer wall, indicated as a whole by the numeral 21, is provided by securing a plurality of plates 22 similar to those. indicated by the numeral 10 hereinbefore described to the side walls 20 and to each other, the plates 22 being secured to the sidewalls by any suitable method and secured to each other preferabl by means of rivets as shown at 23. It w1l1 be noted that the ton e 12' of the plate 22 is bent in an opposite irection to the tongue 12 of the plate 10 and in the same direction as the flanges 11 in order to provide a relatively smooth outer surface and neat appearance of the finished product.

In operation, the exhaust gases enter the passage 17 and due to their inertia are whirled in a tortuous path through the passage 16 whereupon they are liberated through opening 7 passing into the atmosphere through tail pipe 9. As the gas is passed through the tortuous passage 16 the outer portion of the stream or column is skimmed off by means of tongues 12 and retarded, thus destroying the energy of the traveling gases before they are liberated into the atmosphere. Should it be desired to change the tail pipe 9 to the opposite side of the device to permit easy installation in certain instances the plate 8 may be removed to permit the tail pipe to be substituted therefor in which instance the plate '8 may be placed in position to cover the opening 7 my invention herewith shown and described are to be taken as preferred examples of the same, and that various changes in the shape, size and arrangement of parts ma be resorted to without'departing from t e spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, what I claim as new and desire to secure and protect by Letters Patent of the United states, is:

1. A mufiier having side walls and a plurality of sectional units arranged, in a circular row to provide a tortuous passage, said sectional units being provided with tongues extending into said tortuous passa e.

A. mufller having side walls and a plu: rality of sectional units arranged in a circular row to provide a tortuous passage,

said sectional units being provided with tongues extending into said tortuous pasmean-7e sage, a tail pipe secured to one of said walls and communicating with said tortuous passage.

3. A mufiier comprising a pair of side Walls having tangentially disposed projec-.

vide a tortuous passage, said sectional units being provided with depending lips projectin mto said tortuous passage, and an inta e pipe disposed between said tangential projectlons, said tail pipe being secured to said tangential projections and to said sectional units.

4. A muifier comprising a pair of side walls having tangentially disposed projections and central openings, a plurality of sectional units disposed between said side walls and arranged in a spiral row to pro vide a tortuous passage, said sectional units being provided with depending lips projecting into said tortuous passage, an intake pipe disposed between said tangential projections, said tail pipe being secured to said tangentlal projections and to said sectional units, a tail plpe communicating with said tortuous passage through the opening of one of said plates, and a closure arranged upon one of said walls for closing the opening therein.

OSCAR S. JEFFRIES, SR. 

